Patents by Inventor Yutaka Ishikawa

Yutaka Ishikawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8219300
    Abstract: An engine control system and method for controlling engine air flow during a deceleration fuel cut includes an internal combustion engine, an anti-lock braking system (ABS), and an electronic control unit (ECU) that controls the engine. The ECU establishes a desired air flow rate for the internal combustion engine, which is taken from an ABS failed condition look-up table when determined that the ABS has failed while the engine is in a deceleration fuel cut mode, and otherwise is taken from a normal condition look-up table.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: July 10, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Dan Nagashima, Paul DeHart, Hirokazu Toyoshima, Takahide Mizuno, Yoshiharu Saitou, Yutaka Ishikawa, Akio Muto
  • Patent number: 8214117
    Abstract: A driving force controlling apparatus includes a driving force controller configured to determine a state of a road surface. A driving force controller is configured to control a driving force of a vehicle based on the road surface state. A rear-wheel speed sensor is configured to detect a rear-wheel speed. A low-friction-coefficient road surface determining device is configured to determine whether the road surface is a low-friction-coefficient road surface using the rear-wheel speed on a predetermined condition. A determination prohibition device is configured to prohibit the low-friction-coefficient road surface determining device from determining whether the road surface is a low-friction-coefficient road surface, if (a) the rear-wheel speed sensor is abnormal, or if (b) a predetermined time has elapsed from when a shift range is changed from a reverse range to a drive range and/or (c) a gear position has become greater than or equal to a predetermined gear position.
    Type: Grant
    Filed: July 26, 2010
    Date of Patent: July 3, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yutaka Ishikawa, Makoto Kobayashi, Takahito Fujita
  • Patent number: 8111573
    Abstract: Provided is a nonvolatile semiconductor memory device capable of performing a writing action for a memory cell at high speed. The device includes a memory cell array having a first sub-bank and a second sub-bank each having a plurality of nonvolatile memory cells arranged in a form of a matrix; a row decoder shared by the first sub-bank and the second sub-bank; a first column decoder and a second column decoder provided in the first sub-bank and the second sub-bank, respectively; and a control circuit arranged to execute alternately a first action cycle to perform a programming action in the first sub-bank and a reading action for a programming verifying action in the second sub-bank and a second action cycle to perform the reading action for the programming verifying action in the first sub-bank and the programming action in the second sub-bank.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: February 7, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuya Ishihara, Yutaka Ishikawa, Yoshiji Ohta
  • Patent number: 8061463
    Abstract: A hybrid vehicle comprises an engine 2, a motor generator 4, a torque converter 6 with a lock-up clutch 5, and a ratio-change mechanism 7. A control system for the hybrid vehicle comprises a rotational sensor 22, which detects the slip ratio of the torque converter, and a hydraulic control valve 12, which controls the engagement of the lock-up clutch. While the vehicle is moving along with the accelerator pedal being released from its stepped down condition, a driving force from the wheels is transmitted to the motor generator 4 for energy regeneration. If the slip ratio of the torque converter is equal to or smaller than a first threshold value, then only the lock-up clutch is controlled into engagement. However, if the slip ratio is between the first threshold value and a second threshold value, then additionally the motor generator is controlled in cooperative operation.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: November 22, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kazuhiko Kitano, Masachika Kimura, Yasuhiro Ijichi, Yutaka Ishikawa, Takashi Horiguchi
  • Publication number: 20110276239
    Abstract: A system and method of compensating for torque converter slip in a motor vehicle include measuring rotational speeds of an engine crankshaft and mainshaft, as well as measuring operating temperatures of a fluid associated with the motor vehicle. Engine output torque is adjusted as required by controlling some combination of ignition timing, intake air flow, fuel injection, and accessory load.
    Type: Application
    Filed: May 6, 2010
    Publication date: November 10, 2011
    Applicant: Honda Motor Co., Ltd.
    Inventors: Dan Nagashima, Takahide Mizuno, Hirokazu Toyoshima, Lee O'Donnell, Naomichi Tonokura, Akio Muto, Yutaka Ishikawa
  • Publication number: 20110238902
    Abstract: A nonvolatile semiconductor memory device in which a memory cell life can be prolonged while making it possible to perform writing in units of bits. When command information represents writing, a comparing unit 37 compares written data in a target memory cell with write target data to give a comparison result to a write/read control unit 40, when the comparison result represents matching, the write/read control unit 40 does not instruct a decoder unit (51A, 51B, and 53) to perform writing in the target memory cell, and when the comparison result represents mismatching, the write/read control unit 40 instructs the decoder unit to write the write target data in the target memory cell.
    Type: Application
    Filed: November 18, 2009
    Publication date: September 29, 2011
    Inventors: Yutaka Ishikawa, Kazuya Ishihara, Yoshiji Ohta
  • Publication number: 20110035127
    Abstract: A vehicle transmission control apparatus includes an expected-acceleration calculator configured to calculate an expected acceleration of a vehicle based on at least an engine load and a vehicle speed. An actual-acceleration calculator is configured to calculate an actual acceleration of the vehicle. An uphill determination device is configured to calculate an uphill determination value based on a difference between the expected acceleration and the actual acceleration and configured to calculate a corrected uphill determination value by subjecting the uphill determination value to moderating calculation using a moderating coefficient and to update the corrected uphill determination value in accordance with the moderating coefficient. A transmission-characteristic selecting device is configured to select one of transmission characteristics based on the corrected uphill determination value.
    Type: Application
    Filed: August 5, 2010
    Publication date: February 10, 2011
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Yutaka ISHIKAWA, Yasuhiro Gokan, Osahide Miyamoto, Yashiharu Saito
  • Publication number: 20110035126
    Abstract: A driving force controlling apparatus includes a driving force controller configured to determine a state of a road surface. A driving force controller is configured to control a driving force of a vehicle based on the road surface state. A rear-wheel speed sensor is configured to detect a rear-wheel speed. A low-friction-coefficient road surface determining device is configured to determine whether the road surface is a low-friction-coefficient road surface using the rear-wheel speed on a predetermined condition. A determination prohibition device is configured to prohibit the low-friction-coefficient road surface determining device from determining whether the road surface is a low-friction-coefficient road surface, if (a) the rear-wheel speed sensor is abnormal, or if (b) a predetermined time has elapsed from when a shift range is changed from a reverse range to a drive range and/or (c) a gear position has become greater than or equal to a predetermined gear position.
    Type: Application
    Filed: July 26, 2010
    Publication date: February 10, 2011
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Yutaka ISHIKAWA, Makoto Kobayashi, Takahito Fujita
  • Publication number: 20100312444
    Abstract: A control device for controlling an engagement state of a lock-up clutch is provided. A plurality of target slip ratio maps include a normal slip ratio map having a characteristic line of a target slip ratio defined in accordance with an engine load at a normal vehicle running condition and a modified slip ratio map having a characteristic line of the target slip ratio to become a facing calorific value lower than a facing calorific value corresponding to the slip ratio retrieved from the normal slip ratio map. In the case where an estimate value of the facing temperature continues to exceed first threshold temperature for more than predetermined time when to carry out slip control using the normal slip ratio map, control to switch the target slip ratio map from the normal slip ratio map to the modified slip ratio map is carried out.
    Type: Application
    Filed: June 9, 2010
    Publication date: December 9, 2010
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Masaaki TAKAMATSU, Yutaka Ishikawa, Shinya Abe
  • Publication number: 20100262351
    Abstract: An engine control system and method for controlling engine air flow during a deceleration fuel cut includes an internal combustion engine, an anti-lock braking system (ABS), and an electronic control unit (ECU) that controls the engine. The ECU establishes a desired air flow rate for the internal combustion engine, which is taken from an ABS failed condition look-up table when determined that the ABS has failed while the engine is in a deceleration fuel cut mode, and otherwise is taken from a normal condition look-up table.
    Type: Application
    Filed: April 10, 2009
    Publication date: October 14, 2010
    Inventors: Dan Nagashima, Paul DeHart, Hirokazu Toyoshima, Takahide Mizuno, Yoshiharu Saitou, Yutaka Ishikawa, Akio Muto
  • Publication number: 20100191434
    Abstract: Several low-friction-coefficient road-surface determination devices determine whether a road surface has a low friction coefficient based on the highest and lowest wheel speeds; the wheel speeds of front and rear wheels; wheel speeds of a left-hand and right-hand driving wheels; and by comparing a reference vehicle-body acceleration calculated from a driving force of an engine with an actual vehicle-body acceleration calculated from a calculated number of revolutions of differential gears. A low-friction-coefficient road-surface total-determination device makes a total determination as to whether the road surface has a low friction coefficient based on the determination results of the low-friction-coefficient road-surface determination devices. Accordingly, each low-friction-coefficient road-surface determination device is capable of compensating for disadvantages of the other devices.
    Type: Application
    Filed: January 5, 2010
    Publication date: July 29, 2010
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Takahito FUJITA, Yutaka Ishikawa, Makoto Kobayashi
  • Publication number: 20100126816
    Abstract: A control section determines a driving state of a vehicle and controls first and second solenoid valves on the basis of the determined driving state. An oil passage length of a second oil discharge passage is shorter than that of a first oil discharge passage and a discharge end of the second oil discharge passage is opened at a lower position than that of the first oil discharge passage. The control section derives hydraulic oil, discharged from an oil chamber via a first shift valve, to the first oil discharge passage by means of a second shift valve when it is determined that the driving state is one during normal driving. The control section derives the hydraulic oil to the second oil discharge passage by means of the second shift valve when it is determined that the driving state is one required for rapid lock-up off.
    Type: Application
    Filed: November 25, 2009
    Publication date: May 27, 2010
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Hiroshi Takei, Yutaka Ishikawa, Yoshimichi Tsubata, Motoo Takeda
  • Patent number: 7724819
    Abstract: A wireless image transmission device comprises an encoder 180 which encodes combined image data, and includes quantization means 130 to perform quantization of input data based on a quantization value, and an encoding amount control means to control the encoding amount, comprising: first information portion counting means 100, second information portion counting means 102, first information portion transmission time computation means 105, a second information portion transmission time computation means 110, second information portion transmittable bits computation means 112, untransmitted bits computation means 113, and quantization value computation means 115, so that even when a video bitstream is transmitted using a plurality of modulation methods with different transmission rates, by transmitting in a constant amount of time, bandwidth can be used efficiently.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: May 25, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yutaka Ishikawa
  • Publication number: 20100118592
    Abstract: Provided is a nonvolatile semiconductor memory device capable of performing a writing action for a memory cell at high speed. The device comprises: a memory cell array having a first sub-bank and a second sub-bank each having a plurality of nonvolatile memory cells arranged in a form of a matrix; a row decoder shared by the first sub-bank and the second sub-bank; a first column decoder and a second column decoder provided in the first sub-bank and the second sub-bank, respectively; and a control circuit arranged to execute alternately a first action cycle to perform a programming action in the first sub-bank and a reading action for a programming verifying action in the second sub-bank and a second action cycle to perform the reading action for the programming verifying action in the first sub-bank and the programming action in the second sub-bank.
    Type: Application
    Filed: November 3, 2009
    Publication date: May 13, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kazuya Ishihara, Yutaka Ishikawa, Yoshiji Ohta
  • Publication number: 20090294194
    Abstract: A hybrid vehicle comprises an engine 2, a motor generator 4, a torque converter 6 with a lock-up clutch 5, and a ratio-change mechanism 7. A control system for the hybrid vehicle comprises a rotational sensor 22, which detects the slip ratio of the torque converter, and a hydraulic control valve 12, which controls the engagement of the lock-up clutch. While the vehicle is moving along with the accelerator pedal being released from its stepped down condition, a driving force from the wheels is transmitted to the motor generator 4 for energy regeneration. If the slip ratio of the torque converter is equal to or smaller than a first threshold value, then only the lock-up clutch is controlled into engagement. However, if the slip ratio is between the first threshold value and a second threshold value, then additionally the motor generator is controlled in cooperative operation.
    Type: Application
    Filed: June 25, 2009
    Publication date: December 3, 2009
    Applicant: HONDA MOTOR CO., LTD
    Inventors: Kazuhiko KITANO, Masachika KIMURA, Yasuhiro IJICHI, Yutaka ISHIKAWA, Takashi HORIGUCHI
  • Patent number: 7257364
    Abstract: A paper feeding mechanism for a printer includes a discharging unit located on a downstream side of a paper feed path, a feeding unit located on an upstream side with respect to the image transfer station, a tension applying unit that operates to apply tension to the continuous form paper at a position between the image transfer station and the discharging unit. Further provided is a displacement preventing system that prevents a displacement of the continuous form paper in a feeding direction of the continuous form paper when the tension applying unit operates to apply the tension to the continuous form paper.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: August 14, 2007
    Assignee: PENTAX Corporation
    Inventor: Yutaka Ishikawa
  • Patent number: 7103987
    Abstract: A slider or a slide shoe for maintaining an interval between a scale and the slider is provided with inclined faces for excluding a foreign matter on a scale face or a sliding guide face at both ends of the slider in a moving direction thereof or at both ends of the slide shoe.
    Type: Grant
    Filed: April 23, 2004
    Date of Patent: September 12, 2006
    Assignee: Mitutoyo Corporation
    Inventors: Kazuhiko Kodama, Yutaka Ishikawa
  • Patent number: 7100720
    Abstract: A driving power control device for a hybrid vehicle controls the engagement state of a lockup clutch so that high efficiency in regeneration is obtainable. The driving power control device for a hybrid vehicle includes an engine and a motor-generator as power sources, an automatic transmission disposed between the power sources and driving wheels with an intervening torque converter having a lockup clutch, and an ECU for controlling selection of the power sources and for controlling a slip ratio of the torque converter. In this control device, a target slip ratio of the torque converter, which corresponds to a target amount of regeneration that is retrieved using regeneration amount determining factors, is obtained by executing a feedforward control operation using friction torque determining factors, and the slip ratio is controlled in a feedback manner based on the difference between the target slip ratio and the actual slip ratio.
    Type: Grant
    Filed: March 12, 2003
    Date of Patent: September 5, 2006
    Assignee: Honda Giken Kogyo Kabushiki Kaish
    Inventor: Yutaka Ishikawa
  • Publication number: 20060108163
    Abstract: A hybrid vehicle comprises an engine 2, a motor generator 4, a torque converter 6 with a lock-up clutch 5, and a ratio-change mechanism 7. A control system for the hybrid vehicle comprises a rotational sensor 22, which detects the slip ratio of the torque converter, and a hydraulic control valve 12, which controls the engagement of the lock-up clutch. While the vehicle is moving along with the accelerator pedal being released from its stepped down condition, a driving force from the wheels is transmitted to the motor generator 4 for energy regeneration. If the slip ratio of the torque converter is equal to or smaller than a first threshold value, then only the lock-up clutch is controlled into engagement. However, if the slip ratio is between the first threshold value and a second threshold value, then additionally the motor generator is controlled in cooperative operation.
    Type: Application
    Filed: November 18, 2005
    Publication date: May 25, 2006
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Kazuhiko Kitano, Masachika Kimura, Yasuhiro Ijichi, Yutaka Ishikawa, Takashi Horiguchi
  • Patent number: 6939125
    Abstract: A method for reducing NOx, in a combustion gas which is discharged from a combustion furnace for burning a fuel by means of a gas containing oxygen in an amount of at least 80 vol % and which contains oxygen, which method comprises adding a combustible material to the combustion gas at a temperature of from 1,000 to 1,500° C., wherein the combustible material contains a compound comprising C and H.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: September 6, 2005
    Assignee: Asahi Glass Company, Limited
    Inventors: Masamichi Yokotani, Yutaka Ishikawa, Atsushi Tanigaki, Daisuke Hasegawa, Shinji Morohashi